Display screen or portion thereof having a graphical user interface for a process control editor



FIG. 1 is a front view of a display screen or portion thereof having agraphical user interface for a process control editor showing our newdesign; and,

FIG. 2 is a close up front view thereof.

The outermost broken lines illustrate an electronic device, the brokenline at the periphery of the graphical user interface illustrates thedisplay screen or portion thereof, and the remaining broken linesshowing text, numbers, and graphical images illustrate portions of thegraphical user interface. None of the broken lines form part of theclaimed design.

CLAIM The ornamental design for a display screen or portion thereofhaving a graphical user interface for a process control editor, as shownand described.